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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2026-present Eclipse ThreadX contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** USBX Component */
/** */
/** Device CDC ACM Class */
/** */
/**************************************************************************/
/**************************************************************************/
#define UX_SOURCE_CODE
/* Include necessary system files. */
#include "ux_api.h"
#include "ux_device_class_cdc_acm.h"
#include "ux_device_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_device_class_cdc_acm_deactivate PORTABLE C */
/* 6.1.12 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function deactivate an instance of the cdc_acm class. */
/* */
/* INPUT */
/* */
/* command Pointer to a class command */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_device_stack_transfer_all_request_abort Abort all transfers */
/* _ux_device_class_cdc_acm_ioctl IO control */
/* */
/* CALLED BY */
/* */
/* CDC Class */
/* */
/**************************************************************************/
UINT _ux_device_class_cdc_acm_deactivate(UX_SLAVE_CLASS_COMMAND *command)
{
UX_SLAVE_INTERFACE *interface_ptr;
UX_SLAVE_CLASS *class_ptr;
UX_SLAVE_CLASS_CDC_ACM *cdc_acm;
UX_SLAVE_ENDPOINT *endpoint_in;
UX_SLAVE_ENDPOINT *endpoint_out;
/* Get the class container. */
class_ptr = command -> ux_slave_class_command_class_ptr;
/* Get the class instance in the container. */
cdc_acm = (UX_SLAVE_CLASS_CDC_ACM *) class_ptr -> ux_slave_class_instance;
/* We need the interface to the class. */
interface_ptr = cdc_acm -> ux_slave_class_cdc_acm_interface;
/* Locate the endpoints. */
endpoint_in = interface_ptr -> ux_slave_interface_first_endpoint;
/* Check the endpoint direction, if IN we have the correct endpoint. */
if ((endpoint_in -> ux_slave_endpoint_descriptor.bEndpointAddress & UX_ENDPOINT_DIRECTION) != UX_ENDPOINT_IN)
{
/* Wrong direction, we found the OUT endpoint first. */
endpoint_out = endpoint_in;
/* So the next endpoint has to be the IN endpoint. */
endpoint_in = endpoint_out -> ux_slave_endpoint_next_endpoint;
}
else
{
/* We found the endpoint IN first, so next endpoint is OUT. */
endpoint_out = endpoint_in -> ux_slave_endpoint_next_endpoint;
}
/* Terminate the transactions pending on the endpoints. */
_ux_device_stack_transfer_all_request_abort(endpoint_in, UX_TRANSFER_BUS_RESET);
_ux_device_stack_transfer_all_request_abort(endpoint_out, UX_TRANSFER_BUS_RESET);
/* Terminate transmission and free resources. */
_ux_device_class_cdc_acm_ioctl(cdc_acm, UX_SLAVE_CLASS_CDC_ACM_IOCTL_TRANSMISSION_STOP, UX_NULL);
/* If there is a deactivate function call it. */
if (cdc_acm -> ux_slave_class_cdc_acm_parameter.ux_slave_class_cdc_acm_instance_deactivate != UX_NULL)
{
/* Invoke the application. */
cdc_acm -> ux_slave_class_cdc_acm_parameter.ux_slave_class_cdc_acm_instance_deactivate(cdc_acm);
}
/* We need to reset the DTR and RTS values so they do not carry over to the
next connection. */
cdc_acm -> ux_slave_class_cdc_acm_data_dtr_state = 0;
cdc_acm -> ux_slave_class_cdc_acm_data_rts_state = 0;
cdc_acm -> ux_slave_class_cdc_acm_break_duration = 0;
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_DEVICE_CLASS_CDC_ACM_DEACTIVATE, cdc_acm, 0, 0, 0, UX_TRACE_DEVICE_CLASS_EVENTS, 0, 0)
/* If trace is enabled, register this object. */
UX_TRACE_OBJECT_UNREGISTER(cdc_acm);
/* Return completion status. */
return(UX_SUCCESS);
}
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